I guess maybe this is a spoiler, but in a pivotal spanking scene in the new movie “Marty Supreme”, Timothée Chalamet refused to allow a stunt ass to be used:

“When it came time to whack him, there was a stunt ass. There was a double,” O’Leary said. “[Chalamet] wouldn’t do it. He said he’ll do it himself. He didn’t want some other ass immortalized.”

In the moment, that might not have seemed so wise:

O’Leary was supposed to use a fake paddle to soften the blow, but the prop immediately broke on the first hit, requiring him to use a real one. He says shooting the scene “went on for hours,” with Safdie demanding about 40 takes until 4 in the morning.

I’ll bet that stunt ass didn’t mind being able to sit this one out. And being able to sit, at all, for that matter.